Exhaust air jet



Nov. 12, 1957 R. HARING 2,812,634

EXHAUST A-IR JET Filed Nov. 4, 1954 INVENTOR. 4 1 PH HARM 6 ATTO/P/WFXUnited States Patent EXHAUST AIR JET Ralph Haring, Riverton, N. J.

Application November 4, 1954, Serial No. 466,799

1 Claim. (Cl. 60-32) The present invention relates to the exhaust pipeof a conventional motor vehicle and is concerned primarily with anattachment which introduces a jet of air into the exhaust pipe.

The exhaust pipe, together with the muffler, affects the operation ofthe internal combustion engine itself. Thus, such factors as gasolineand oil consumption, heat, formation of carbon deposits, wear on thepiston rings, and power developed are all, to some degree, related to ordependent on the operation of the exhaust pipe. Then again, the noise ofthe mufller, the condensation of gases, the life of the muffler and theoperation of the cooling system are also tied up with the functioning ofthe exhaust pipe.

With the foregoing conditions in mind the present invention has in viewas its foremost objective the provision of an attachment which isintended to be applied to an exhaust pipe by being substituted for theend section thereof and which attachment includes means for introducingan air jet into the exhaust stream with many beneficial resultsresulting therefrom. These results may be briefly summarized as follows.

The reduction of pressure in the exhaust pipe that is caused by this airjet reduces the temperature of the exhaust pipe itself as well as thatof the cooling system of the car. It causes better combustion in theengine with the resulting savings in gasoline and oil consumption.Carbon deposits are substantially reduced, if not completely eliminated,and the wear on the piston rings is reduced. Condensation of the gasesfrom the exhaust pipe is reduced, if not eliminated, the noise of themuffier is reduced and the reduction of back pressure in the exhaustpipe gives greater power development. This, in turn, causes better pickup by the engine. The life of the mufiier is also increased.

In providing an attachment, of the character aforesaid, the inventioncontemplates substituting a tubular section for the end section of theexhaust pipe. Mounted on this substitute tubular section is an air scoopthat presents a wide mouth for entrapping air due to movement of thevehicle and which scoop has a gradually diminishing cross section whichterminates towards the rear at a point of communication with anoval-like opening formed in the wall of the tubular section. This wallis further deformed to provide a trough or groove of gradually diminishing depth from the opening forward.

Particular objects and advantages of the invention are tied up with themanner of securing the substitute section in position.

Another object of the invention is to provide, in a device of thecharacter indicated, an air scoop having a screen across its open mouthfor preventing the pickup of foreign matter which might tend to clog upthe device. Following this same thought, a further object is to providea guard in the form of a rearwardly inclined bar which extends over andin front of the mouth of the air scoop to prevent catching on twigs,branches and the like.

Various other more detailed objects and advantages of the invention,such as arise in connection with carry- 2,812,634 Patented Nov. 12, 1957ing out the above-noted ideas in a practical embodiment, will in partbecome apparent and in part be hereinafter stated as the description ofthe invention proceeds.

The invention, therefore, comprises an exhaust air jet that consistsessentially of a tubular section intended to replace the end portion ofan exhaust pipe and which is provided with an air scoop having a screenand a guard, with the air scoop and tubular section properly shaped toprovide for a good conductive communication from the air scoop to thetubular section so that the jet of air that is created is introducedinto the tubular section in an efficient manner.

For a full and more complete understanding of the invention, referencemay be had to the following description and accompanying drawingwherein:

Figure 1 is a view in side elevation of an exhaust air jet designed inaccordance with the precepts of this invention.

Figure 2 is a view in front elevation of the attachment.

Figure 3 is a transverse vertical section taken about on the planerepresented by the line 3-3 of Figure 1.

Figure 4 is a longitudinal vertical section taken about on the planerepresented by the line 4-4 of Figure 3; and

Figure 5 is another detailed vertical section taken about on the planerepresented by the line 5-5 of Figure 2.

Referring now to the drawing wherein like reference characters denotecorresponding parts, and first more particularly to Figure 1, a portionof an exhaust pipe is represented in broken outline at 10. It will beunderstood that the conventional exhaust pipe of the motor vehicle iscut off at an appropriate point to make room for the attachment of thisinvention and the portion at 10 represents the remaining part of theexhaust pipe.

The attachment of this invention includes as essential elements atubular section 11 and an air scoop S. One end of this section 11 issplit, as indicated at 12, to facilitate insertion of the exhaust pipe10 therein and a clamping ring 13 is received in a groove 14 formed inthe end portion of the section 11 so as to securely clamp this endportion about the exhaust pipe 10 and effect a good connectiontherewith. The end of the tubular section 11 remote from the clampingring 13 may be supported from the chassis of the vehicle in anypreferred manner, such as by the hanger at 15.

Referring now more particularly to Figures 3 and 4, the tubular section11 is shown as being formed with a cut or slit at 16 and the wallimmediately forwardly of this cut is deformed to provide a groove 17 ofgradually diminishing depth with the deepest part of the groove beinglocated at the cut 16. Thus, the end of the groove 17 and the cut 16cooperate to define an oval shaped opening that establishescommunication between the exterior and interior of the tubular section11.

The air scoop S may be made from any appropriate material such as asheet metal that is susceptible of being formed into the shapeillustrated and comprises side walls 18 which are joined by a top bend19 with the latter having a tongue-like extension 20 that is insertedthrough the cut 16 so that it underlies the wall of the tubular section11. The side walls 18 are of gradually diminishing width from the frontto the rear with the bend 19 assuming the inclined directionillustrated. Thus the forward edges of the walls 18 and bend 19 definethe mouth of the air scoop which may be lined by the U-shaped member 21of rubber or similar material. A screen 22 covers and protects thismouth.

A guard rail or rod 23 has its forward end anchored to the clamping ring13 and extends rearwardly and outwardly in a position in which itprotects the mouth of the air scoop S.

The air scoop S may be secured to the tubular section 3 11 in anypreferred manner. As illustrated in the drawing, rivets 24 are employedfor this purpose. However,

-it is understood that welding or soldering may be substituted for sucha means of attachment.

Operation 7 creates a draft of air relative to the scoop S. The scoop Spicks up the air and due to its gradually diminishing cross section thedraft of air is formed into a jet which is introduced into the oval-likeopening at the split 16 into the bore of the tubular section 11. Thisjet of air affords the advantages above listed. The screen 22 and guardrod 23 definitely prevent any foreign matter from being picked up by thescoop and thus entirely eliminates any possibility of impairing itsoperation.

While a preferred specific embodiment of the invention is hereinbeforeset forth, it is to be clearly understood that the invention is not tobe limited to the exact constructions, mechanisms and devicesillustrated and described, because various modifications of thesedetails may be provided in putting the invention into practice withinthe purview of the appended claim.

What is claimed is:

In an exhaust air jet, a tubular section formed with a transverse slitand having a wall on one side of said slit that is deformed to provide atrough of gradually diminishing depth, the end of said trough and saidslit cooperating to define an oval shaped opening, and an air scoopmounted on said tubular section over said trough and slit, said airscoop comprising side walls, the edges of which are attached to saidtubular section with the side walls being joined by a bend that isinclined relative to said tubular section, said bend having atongue-like extension extending through said oval opening.

References Cited in the file of this patent UNITED STATES PATENTS

